What does Google say about SEO? /
Redirects represent a critical technical component of search engine optimization, especially during site migrations, redesigns, or URL structure changes. This category compiles all official Google statements regarding the implementation of various redirect types (301, 302, 307, 308) and their SEO implications. Understanding Google's stance on redirects is vital for preserving page authority and rankings during structural modifications. SEO practitioners will find valuable insights on PageRank transfer, Googlebot processing timeframes, best practices for avoiding redirect chains, and context-specific recommendations (HTTPS migrations, mobile versions, international content). Google has significantly evolved its redirect handling over the years, notably regarding temporary redirects that can now pass ranking signals under certain conditions. This official documentation enables optimization of migration strategies, minimizes organic traffic loss, and ensures smooth transitions during URL changes while adhering to the search engine's technical guidelines. Whether planning a domain migration, implementing HTTPS, or restructuring site architecture, these authoritative declarations provide the foundation for making informed decisions that protect search visibility and maintain hard-earned rankings throughout technical transformations.
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★★★ Does a domain migration really lead to traffic loss?
A well-executed domain migration does not necessarily result in overall traffic loss. If you simply copy the entire URL structure and content to a new domain, traffic will decrease on the old one and ...
Martin Splitt Aug 27, 2020
★★ Should you really leave the robots.txt file unchanged during an SEO migration?
Do not change the configuration of the robots.txt file during a migration. If certain URLs were blocked by robots.txt for good reasons before the migration, they must remain blocked after the migratio...
Martin Splitt Aug 27, 2020
★★★ Should you really use Google Search Console's address change tool during a migration?
The address change tool in Search Console explicitly tells Google that a migration is intentional and not temporary or accidental. This additional signal allows Google to reprioritize the crawl, make ...
Martin Splitt Aug 27, 2020
★★★ Merging two websites: Why doesn’t Google treat this like a standard migration?
Merging two websites into one is not a standard site migration. It involves creating a new site that combines two existing versions, which requires Google to re-crawl numerous pages. The outcome and p...
Martin Splitt Aug 27, 2020
★★★ How Does Google Actually Determine the Canonical URL of Your Pages?
John Mueller provided on Twitter a list of criteria that Google takes into account to define what the canonical URL of a page is (and therefore its "canonicalization"): redirects, internal links, exte...
John Mueller Aug 24, 2020
★★★ Does the Mobile First Index Really Apply Automatically to New Websites?
Google indicated in May 2019 that starting from July 1st of that same year, all new sites discovered by the search engine's crawlers would automatically be integrated into the Mobile First Index. John...
John Mueller Aug 24, 2020
★★★ Does rel=canonical really protect your syndicated content from ranking theft?
When syndicating an article with rel=canonical, two outcomes are possible: either Google indexes both pages separately (risking the syndicator ranking better), or Google chooses a unique canonical. Th...
John Mueller Aug 21, 2020
★★ Can Google really treat URL changes made by JavaScript and the History API as redirects?
When JavaScript uses the History API to modify the URL after loading (e.g., simplifying parameters), Google may interpret this as a redirect to the new URL and choose it as canonical. This can be veri...
John Mueller Aug 21, 2020
★★ Can the JavaScript History API really force Google to change your canonical URL?
When JavaScript uses the History API to change the URL after the page has loaded, Google may interpret this change as a redirect and choose the modified URL as canonical. This behavior depends on the ...
John Mueller Aug 21, 2020
★★★ Do cascading internal 301 redirects really drain SEO juice?
Even if internal navigation points to old URLs that redirect via 301, Google follows the chain and treats the link as going directly to the final destination (the canonical). No loss of value. Users c...
John Mueller Aug 21, 2020
★★★ Do internal 301 redirects really dilute PageRank?
If your internal links point to URLs that redirect via 301, Google follows the redirect, identifies the final URL as canonical, and treats the link as if it points directly to the destination. No loss...
John Mueller Aug 21, 2020
★★★ Should You Stop Using the Canonical Tag for Pagination and Redirects?
Rachel Costello and Martin Splitt have published a very interesting video on web page canonicalization and therefore the "canonical" tag. They explain in particular that this tag was created primarily...
Martin Splitt Aug 17, 2020
★★★ Is using the canonical tag as a redirection sabotaging your crawl budget?
The canonical tag does not replace a redirection. For an out-of-stock product, you should redirect to a relevant similar product for the user, or return a temporary 404. Using a canonical to point to ...
Martin Splitt Aug 13, 2020
★★ Why does Google aggressively recrawl your site after a migration?
When Google detects significant changes on a site (URL structure change, domain migration), it may trigger an accelerated recrawl to quickly obtain an updated image. The site is neither paused nor rem...
John Mueller Aug 11, 2020
★★★ Can temporary technical bugs really sink your Google ranking for good?
Temporary technical problems (redirects that come and go, URLs that change and then revert) do not cause any lasting negative sentiment from Google's systems. Once the issue is resolved and the pages ...
John Mueller Aug 11, 2020
★★ Should you index a new URL before redirecting an old one in a 301?
There is no need to pre-index a new URL before redirecting the old one via 301. Google will recognize the new URL at the time of the redirection and will focus on it. You can redirect to a completely ...
John Mueller Aug 11, 2020
★★ How long does it take to recover traffic after a 301 redirect bug?
After a URL change with 301 redirects, if the new URLs have been crawled and then disappeared due to a bug (redirecting to 404), Google sees them as deleted and removes them from the index. Reindexing...
John Mueller Aug 11, 2020
★★★ Can a bug restoring your old URLs kill your SEO?
When a site changes its URL structure with 301 redirects and then temporarily reverts to the old structure due to a bug, Google can handle this situation. If the redirects disappear and the site retur...
John Mueller Aug 11, 2020
★★ Is it really necessary to wait for indexing before redirecting a URL in 301?
There is no need to get a new URL indexed by Google before implementing a 301 redirect to it. Google will recognize the new URL and automatically focus on it after the redirect is set up. Prior indexi...
John Mueller Aug 11, 2020
★★★ Hreflang and geo-targeting: Can Google really ignore your international signals?
Hreflang and geo-targeting are signals of preference, not absolute restrictions. Google may show a page /en-se (Sweden) to users in India or the United States if the algorithms decide it’s the best ve...
John Mueller Aug 04, 2020
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